From 1.x

To upgrade from hubot-markov 1.x:

Set HUBOT_MARKOV_STORAGE to redis.
Set HUBOT_MARKOV_STORAGE_URL to the connection URL of your Redis instance. The default is redis://localhost.
If you have HUBOT_MARKOV_NOREVERSE set, change it to HUBOT_MARKOV_REVERSE_MODEL with the opposite value instead.